ChroGPS Dash is a lightweight, high-performance, and mobile-friendly web dashboard for monitoring GPS-disciplined Stratum 1 NTP servers on Debian (and equivalent) which run Chrony and GPSd. It provides real-time diagnostics and metrics for Chrony and GPSd, featuring a live satellite skyview, SNR telemetry, precision timing metrics, and more.

ChroGPS Dash is Free and Open Source Software released under the MIT License.

Quick Installation

curl -fsSL https://chro.gpsda.sh/install | sudo bash

Then, simply point your browser to http://chrogps-dash.local to access the Dashboard.¹

(The installer handles the web server, permissions, and dashboard deployment automatically. Chrony and GPSd must already be installed and running – if you still need to set those up, see Hardware Setup below.)

curl -fsSL https://chro.gpsda.sh/install | sudo bash -s -- -dt

Hardware Setup

curl -fsSL https://chro.gpsda.sh/hardware-init | sudo bash

Screenshots

Features

• Mission Control Dashboard: A comprehensive, real-time view of Chrony sources, GPS satellite status, and an interactive skyview with per-constellation filtering.
• Signal & Sync Health Monitoring: Intelligent, color-coded health scores for antenna signal integrity and clock synchronization precision.
• Performance Tracking Sparklines: Instant visual SNR trends for every satellite, allowing you to monitor signal stability over the last 60 minutes at a glance.
• Native SVG Analytics: Ten interactive, server-side generated history graphs for performance, stability, and GNSS metrics - built with zero external dependencies.
• Advanced Solar Interference Tracking: Real-time solar position overlay to help distinguish solar interference events from hardware failures.
• Sophisticated UI/UX: A fully responsive, mobile-friendly interface featuring 22 color themes, keyboard shortcuts, draggable layout reordering, collapsible dashboard sections, and persistent satellite table sorting.
• Integrated Admin Panel: Browser-based configuration and system management (service restarts, log purging) without needing SSH.
• Lightweight & Private: A zero-dependency, self-contained PHP/JS backend with no external fonts, trackers, or internet requirements. Includes an optional dashboard-wide authentication gate for public-facing instances.
• Advanced Technical Design: Engineered with O(log n) binary search algorithms and a custom SVG graphing engine. See the Technical Specifications for more.
• Universal GNSS Compatibility: If GPSd supports your receiver, ChroGPS Dash does too. See the GNSS Compatibility Guide for details.

Updating ChroGPS Dash

curl -fsSL https://chro.gpsda.sh/install | sudo bash -s -- -dt

If you prefer the command line, simply re-run the Quick Installation command - it updates the dashboard in place and retains all of your custom settings .

Requirements

• OS: Debian 12 (bookworm) or greater, or a supported distribution .
• Hardware: Raspberry Pi or similar SBC with a GPS module connected.
• GPS/NTP Stack: Chrony and GPSd must be installed and configured before running the installer. If you need to set these up, the Hardware Setup script handles this automatically.
• Installed by the installer: Nginx, PHP-FPM 8.1+.

Supported Distributions

In addition to native Debian 12 (bookworm) or greater, the installer explicitly supports:

• Ubuntu: 22.04 LTS and greater.
• Raspberry Pi OS: Versions based on Bookworm or greater.
• Armbian: Versions tracking the Debian 12+ or Ubuntu 24.04+ repositories.
• Linux Mint: 22 and newer (based on the Ubuntu 24.04+ package set).

Documentation

Software License

ChroGPS Dash is distributed under the MIT License .